Bending-machine



0. 0. HAYES.

BENDING MACHINE. APPLICATION FILED APR. 3, I920. 1,35%,481. Patented Oct. 5,1920.

3 SHEETS-SHEET 1.

INVENTOR. ORA O. HAY ES A TTORNEY O. 0. HAYES.

SENDING MACHINE.

APPLICATION FILED APR. 8. 1920.

1,354,4 1, Patented 001:. 5,1920.

3 SHEETS-SHEET 2.

FIG. .3.

FIG. 4-.

, INVENTOR. ORA O. HAYES BY a. (5%,

A TTORNEY 0. 0: HAYES.

BENDING MACHlNE.

APPLICATION FILED APR. 8. 1920.

LBMAm. I Patented Oct. 5,1920.

3 SHEETS-SHEET 3.

ELI!" INVENTOR. ORA O. HAYES A TTORNEY ORA HAYES, OF MINNEAPOLIS, MINNESOTA.

BENDING-MACEINE.

Specification of Letters Patent.

Patented Oct. 5, 1920.

Application filed April 8, 1920. Serial No. 372,346.

To all whom it may concern: 7

Be it known that I, Or n Harris, a citizen of the United States, residing at lilinneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful. Improvements in Bending- Machines, of which the following is a specification.

This invention relates to hoop bending machines and the object is to provide a highly improved machine whereby wooden hoop sections may be bent without breaking the same, and adjusting means whereby the radii of such hoop sections may be deter mined by regulating the machine as desired. Other objects will be disclosed in the course of the following specification and in the accompanying drawings, in which;

Figure 1 is a top view of the machine.

Fig. 2 is a right side elevation of the machine with parts thereof broken away.

Fig. 3 is a sectional view as seen substantially on line 3-3 in Fig. 2.

Fig. lis a front elevation of the machine, with some parts omitted.

F 5 is an enlarged fragmentary view of the link belt and its driving roller.

Fig. 6 is an enlarged detail View tion of the link belt.

Fig. 7 is a detail iew illustrating the action of the chain and rollers in bending a hoop section.

Referring to the drawings by reference numerals, 8 designates a suitable frame, to which is pivotally secured at 8 a secondary frame 9. A pulley 10 which is adapted to be connected to a source of power is fixed on a shaft 11 which is journaled in the main frame 3, and which has at its other end a pinion 12. The pinion 12 drives a gear 13 which together with a pinion 14 is secured on a shaft 15 which is also journaled in the main frame. A pinion 16, also secured on the shaft 15, meshes with and drives a pinion 17 on a shaft 18 which is journaled at its ends in link arms 18 which are suspended from journal bearings 18 on the secondary rame 9. The proper working distance be-- tween the shafts l5 and 18 is maintained by suitable link members -18. The pinion 19 meshes with and drives a gear 20 which is secured on a shaft 21 journaled in the bearings 18'. A longitudinally corrugated roller 22 is fixed on the shaft 21.

A gear 23, meshing with pinion 14, drives of a por-- a shaft 24:, ournaled in the main frame, and on which is secured a roller 25 having sprocket teeth 26 adapted to engage and drive a link belt 27. The link belt 27 is stretched over the roller 25 and also over a roller 28 whose shaft is journaled in bearings 29 which are longitudinally adjustable on the main frame. The bearings 29 are each provided with threaded bars 30 which extend through fixed brackets 31 on the main ends in suitable bearings and are threaded at their lower ends into pivotally mounted blocks 41 secured to the main frame.

Hingedly mounted on'the rear end of the machine is a guiding frame 42 having a number of vertical dividing partitions, which when the frameis in its upright position, serve to guide strips of material into the machine. If wide boards are to be bent said frame may be dropped backward (as shown by dotted lines), thus allowing a board as wide as the link belt to pass through. The material being bent in the machine, after leaving the link belt 27 passes over a plate 43 which is secured to the frame 9 and is consequently adjusted with the raising and lowering of the roller 22. This plate 43 acts as a support for and assists in the bending of the strips as they leave the machine.

The method of operation and adjusting of this machine though quite obvious may be more particularly explained as follows:

The strips 4% which are to be bent into arcs are first softened by steaming, after which they ar passed through the frame 42 and in between the link belt 27 and the roller 22, where,and also with the assistance of the plate 43, they are bent as mentioned. If a shorter arc radius is desired the roller 28 is adjusted rearward by turning the hand wheel 35, which will'allow a greater slack in the upper run of the belt. The roller 22 and the plate 43 are then lowered by turning the wheel 37. The link belt 27 must be of metal it relative thereto;

to withstand the pressureto which it is subjected, and as it presents a substantially unbroken surface it has the effect of prevent-' ing the wood from splintering and breaking as it passes over it This object is further attained by reason of the roller 22 being corrugated and being power driven in correlation with the link belt.

It is the specific object of this particular machine. to bend strips for use in the construction of silos wherein a number of these strips are nailed together into hoops which are positioned horizontally and so spaced as to serve as braces for the inner and-outer walls which are nailed thereto.

When the machine is in full running order the strips are fed into the frame 42 successively so that the full width of the belt may be constantly utilized.

It is understood that modifications may be made "in'the design and construction of this machine if such modifications come 2. A bending machine consisting of a suitable frame, a pair of power operated rollers mounted in the frame, an apron stretched over said rollers and consisting of laterally adjacent endless rows of metal links causing said apron to present a substantially-unbroken surface, a plurality of rods positioned transversely in said apron to act as common pivots for said links, a bending;roller adapted to coact against said apron, and means for adjustably mounting it relative thereto.

3. A bending machine consisting of a main frame, and a secondary frame adjustably mounted thereon, a power driven link belt stretched over suitable rollers in said main frame, a power driven bending roller mounted in said secondary frame and adapted to bear'transversely against said link belt, anauxiliary bending member fixed to said secondary frame, means for adjusting said secondary frame relative to the main frame. r

4; A strip bending machine consisting of a main frame, a power actuated link belt mounted therein, a suitably journaled bending roller adapted to coact transversely with said link belt in bending strips therebetween, a'guiding frame positioned on said main frame'and having partitions therein, as specified.

V 5, A strip bending machine consisting of a main frame, a power actuated link belt mounted therein,.a suitably j'ournaled bending roller adapted to coact transversely with said link belt in bending strips therebetween, a guiding frame pivotally mounted onsaid main frame and having partitions between and from which said strips may be fed'into between said link belt and bending roller; 7 r

6. A bending machine consisting of a main frame and a secondary frame, pivotal connection between said frames whereby the latter may swing to and from the former, a power driven link belt stretched over rollers journaled in the main frame, a bending roller journaled in the secondary frame and adapted to engage transversely against said link belt, an auxiliary'bending member fired to the outer end of said secondary frame, means for simultaneously adjusting said bending roller and said bending member relative to said main frame.

-7. A bending machine consisting of a main frame and a secondary frame adjustably mounted thereon, a pair of parallel rollers journal'ed in said main frame the same having a link belt stretched thereover, a bending roller journaled in said secondary frame and adapted to coact transversely against said belt, a drive shaft jo'urnaled in 'the main frame and operative connection between the same and said parallel rollers, a toggle connection between said drive shaft and said bending roller, operative connection between said drive shaft and bending roller; 7 Z

i 8. A bending machine consisting of a main frame and a secondary frame adjustably mounted thereon, a pair of parallel rollers journaled in said main frame the samehaving a link belt stretched thereover, a bending roller journaled in said secondary frame and adapted to coact transversely against said belt, 'a drive shaft journaled in the main frame and operative connection between the same and said parallel rollers, a toggle connection between said drive shaft and said bending roller, a counter-shaft journaled in 'thejoint of said toggle connection, operative connection between said 'oountershaft and said drive shaft and bending roller.

In testimony whereof ORA O. HAYES.

I afliX my signature. v 

